Pace Conversion Calculator
Instantly convert between km/h, mph, min/km and min/mile, and see the corresponding 5K, 10K, half-marathon and marathon finish times if you maintain the same pace.
12.0 km/h · 7.46 mph · 5:00/km · 8:03/mi
Pace 5:00 /km
Equivalent pace and speed
| Equivalent Units | Value |
|---|---|
| km/h | 12.0 |
| mph | 7.46 |
| min/km | 5:00 |
| min/mile | 8:03 |
Even-pace race times
| Race Distance | Finish Time (even-pace) |
|---|---|
| 5K | 0:25:00 |
| 10K | 0:50:00 |
| Half Marathon | 1:45:29 |
| Marathon | 3:30:59 |
How it works
Choose a unit and enter a value, such as 12.0 km/h. The other units and race times update automatically.
What to keep in mind
This tool converts units at a constant speed. Race times apply only if you maintain that pace to the finish. For a race-time prediction, see the Race Predictor. It uses the international mile (1609.344 m).
Methodology & sources
Units: 1 international mile = exactly 1.609344 km (NIST SP 811 / NIST Revised Unit Conversion Factors). Conversions: 1 mph = exactly 1.609344 km/h; 1 km/h ≈ 0.621371192 mph; min/km = 60 / km/h; min/mile = min/km × 1.609344. Distances: 5 km, 10 km, half marathon 21.0975 km and marathon 42.195 km follow World Athletics standards. Precision: no intermediate rounding. Display: km/h to one decimal place, mph to two, and pace and times to the nearest second.
Last updated: 24 August 2026
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Conversion is a mathematical task that takes seconds. Knowing the pace you should run tomorrow takes more.